The R F Royce mirrors are nice. I've looked through a 10" and was very impressed with the views. Would highly recommend them. Though at native focal ratios between F/4 and F/8, they're quite fast for a planetary scope. Sure a barlow or powermate can resolve this, but why add more glass to your imaging train when you can get a scope with a higher native focal ratio such as F/25 found in some classical cassegrains or dall-kirkham optical designs.
Depends on how much of a purist you want to be.
